Nutrients
Pineapple is an excellent source of vitamin C and manganese. It’s a very good source of vitamin Bl. It’s a good source of vitamin B6, copper, magnesium, and dietary fiber.

Glycemic Index (GI)
In a study to determine the GI of various foods, it was concluded that pineapples have a low GI of 46 - 51.

Mucha Habermann's Disease
Mucha Habermann's disease (Pityriasis lichenoides chronica) is a rare disease of the immune system of unknown origin, characterized by recurrent red, round and elevated lesions on the skin. In a 3-month study involving 8 patients with Pityriasis lichenoides chronica (PLC), they were treated with bromelain, an enzyme found in pineapple and pineapple stems. It was concluded that bromelain is an effective therapeutic option for PLC after all patients showed complete recovery.

Thrombosis
Studies have shown bromelain to display fibrinolytic and antithrombotic activity, and two clinical trials on heart patients have shown a practically complete elimination of thrombosis.

Digestion
Bromelain aids and promotes digestion due to its protein digesting capabilities, and may relieve symptoms of stomach upset or heartburn.

Sinusitis
In Germany, where bromelain is approved by the German Commission E for the treatment of sinusitis, a clinical trial demonstrated that children diagnosed with acute sinusitis recovered significantly faster when treated with pineapple bromelain compared to other treatments.

Anti Inflammatory
There is some clinical evidence that suggests the effectiveness of bromelain as an anti-inflammatory, and may reduce swelling, bruising, healing time, and pain following surgery and physical injuries. In a 3-month study involving subjects with mild acute knee pain, it was concluded that bromelain might be effective in ameliorating pain.
Bromelain found in pineapple is a proteolytic enzyme (enzymes that digest protein), and in a clinical trial involving patients with periarthritis of the shoulder, and also patients suffering from painful osteoarthritis of the knee, pain reduction with the treatment of proteolytic enzymes was comparable to those treated with NSAIDs (Non-steroidal anti-inflammatory drugs)